﻿//
// (C) Copyright 2009 Irantha Suwandarathna (iranthas@hotmail.com)
// All rights reserved.
//

/* Copyright (c) 2001-2008, The HSQL Development Group
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 * modification, are permitted provided that the following conditions are met:
 *
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 * list of conditions and the following disclaimer.
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 *
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 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EffiProz.Core.Errors;

namespace EffiProz.Core.DataTypes
{
    public class IntervalSecondData
    {
        public long units;
        public int nanos;

        public static IntervalSecondData newIntervalDay(long days,
                IntervalType type)
        {
            return new IntervalSecondData(days * 24 * 60 * 60, 0, type);
        }

        public static IntervalSecondData newIntervalHour(long hours,
                IntervalType type)
        {
            return new IntervalSecondData(hours * 60 * 60, 0, type);
        }

        public static IntervalSecondData newIntervalMinute(long minutes,
                IntervalType type)
        {
            return new IntervalSecondData(minutes * 60, 0, type);
        }

        public static IntervalSecondData newIntervalSeconds(long seconds,
                IntervalType type)
        {
            return new IntervalSecondData(seconds, 0, type);
        }

        public IntervalSecondData(long seconds, int nanos, IntervalType type)
        {

            if (seconds >= type.getIntervalValueLimit())
            {
                throw Error.error(ErrorCode.X_22015);
            }

            this.units = seconds;
            this.nanos = nanos;
        }

        public IntervalSecondData(long seconds, int nanos)
        {
            this.units = seconds;
            this.nanos = nanos;
        }

        /**
         * normalise is a marker, values are always normalised
         */
        public IntervalSecondData(long seconds, long nanos, IntervalType type,
                                  bool normalise)
        {

            if (nanos >= DTIType.limitNanoseconds)
            {
                long carry = nanos / DTIType.limitNanoseconds;

                nanos = nanos % DTIType.limitNanoseconds;
                seconds += carry;
            }
            else if (nanos <= -DTIType.limitNanoseconds)
            {
                long carry = -nanos / DTIType.limitNanoseconds;

                nanos = -(-nanos % DTIType.limitNanoseconds);
                seconds -= carry;
            }

            int scaleFactor = DTIType.nanoScaleFactors[type.scale];

            nanos /= scaleFactor;
            nanos *= scaleFactor;

            if (seconds > 0 && nanos < 0)
            {
                nanos += DTIType.limitNanoseconds;

                seconds--;
            }
            else if (seconds < 0 && nanos > 0)
            {
                nanos -= DTIType.limitNanoseconds;

                seconds++;
            }

            scaleFactor = DTIType.yearToSecondFactors[type.endPartIndex];
            seconds /= scaleFactor;
            seconds *= scaleFactor;

            if (seconds >= type.getIntervalValueLimit())
            {
                throw Error.error(ErrorCode.X_22015);
            }

            this.units = seconds;
            this.nanos = (int)nanos;
        }

        public override bool Equals(Object other)
        {

            if (other is IntervalSecondData)
            {
                return units == ((IntervalSecondData)other).units
                       && nanos == ((IntervalSecondData)other).nanos;
            }

            return false;
        }

        public override int GetHashCode()
        {
            return (int)units ^ nanos;
        }

        public int compareTo(IntervalSecondData b)
        {

            long diff = units - b.units;

            if (diff == 0)
            {
                diff = nanos - b.nanos;

                if (diff == 0)
                {
                    return 0;
                }
            }

            return diff > 0 ? 1
                            : -1;
        }

        public long getSeconds()
        {
            return units;
        }

        public int getNanos()
        {
            return nanos;
        }
        public override String ToString()
        {
            throw Error.runtimeError(ErrorCode.U_S0500, "IntervalSecondData");
        }
    }
}
